After I imported new lesson I see the message “Inaccessible until shared”.
I can’t share this lesson because this is a copyrighted material. What can I do with this issue?
Hi Gintaras,
Free members are limited to a total of 5 privately imported lessons. After importing your 5th, you will only be able to import lessons to share them.
I fear the only solution is to upgrade your account to Basic.
EDIT: Alex answered at the same time and in a nicer way! 
Thanks, but it’s not the case. My account is Basic, however in the morning when I imported those lessons it was Free for awhile
I wrote a post about some strange message noticing that Free members are allowed to have only 5 lessons and I thought it was a bug because of upgrade or something, however I could import the lesson but couldn’t open it so I didn’t publish it.
Then I’ve noticed that my membership expired and I renewed it. However I couldn’t open imported lessons nonetheless.
Maybe I should to import them once again?
Yep, just import them again and you should be good to go
Yeah, it works now. Thanks again. It was a bit shocking news to loose ability to learn from my own materials